Analysis on the Variation of ≥10 ℃ Accumulated Temperature and Its Formation Causes in the Eastern Hetao Area in Recent 50 Years  
LI Yanchun,YANG Jianling,SU Zhansheng,LI Xinrun
Journal of Arid Meteorology . 2013, (3): 511 -516 .  DOI: 10. 11755/j. issn. 1006 -7639(2013) -03 -0511